11111109901 has 2 divisors, whose sum is σ = 11111109902. Its totient is φ = 11111109900.

The previous prime is 11111109857. The next prime is 11111109907. The reversal of 11111109901 is 10990111111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7400472676 + 3710637225 = 86026^2 + 60915^2 .

It is a cyclic number.

It is not a de Polignac number, because 11111109901 - 2¹³ = 11111101709 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11111109907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5555554950 + 5555554951.

It is an arithmetic number, because the mean of its divisors is an integer number (5555554951).

Almost surely, 2^11111109901 is an apocalyptic number.

It is an amenable number.

11111109901 is a deficient number, since it is larger than the sum of its proper divisors (1).

11111109901 is an equidigital number, since it uses as much as digits as its factorization.

11111109901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 81, while the sum is 25.

The spelling of 11111109901 in words is "eleven billion, one hundred eleven million, one hundred nine thousand, nine hundred one".